Speaker
Andrin Doll
(Paul Scherrer Institute)
Description
A setup for microwave excitation around 4 GHz has been constructed at the Swiss muon source at PSI. Two classes of experiments are shown, where μSR with such microwave excitation has the potential to obtain new insights. The first example is microwave spectroscopy of muonium centres that are formed after a delay upon muon implantation, which causes dephasing in transverse-field μSR. The second example is μSR of a ferromagnet with conical spin texture that is driven into ferromagnetic resonance (FMR). While both FMR and μSR of such helimagnets are well established, the combined approach could reveal low-frequency MHz dynamics that emerge from the GHz drive via non-linear interactions, such as a recently proposed magnetic Archimedean screw.
